Using a sample of 232x10(6) Upsilon(4S)-> B (B) over bar events collected with the BABAR detector at the PEP-II B Factory in 1999-2004, we study B--> (DK*)-K-0(892)(-) decays where K*--> K(S)(0)pi(-) and D-0-> K(-)pi(+), K(-)pi(+)pi(0), K(-)pi(+)pi(+)pi(-) (non-CP final states); K+K-, pi(+)pi(-) (CP+ eigenstates); K(S)(0)pi(0), K(S)(0)phi, and K(S)(0)omega (CP- eigenstates). We measure four observables that are sensitive to the angle gamma of the CKM unitarity triangle; the partial-rate charge asymmetries A(CP +/-) and the ratios of the B-decay branching fraction in CP +/- and non-CP decays RCP +/-: A(CP+)=-0.08 +/- 0.19(stat)+/- 0.08(syst), A(CP-)=-0.26 +/- 0.40(stat)+/- 0.12(syst), RCP+=1.96 +/- 0.40(stat)+/- 0.11(syst), and RCP-=0.65 +/- 0.26(stat)+/- 0.08(syst).
Measurement of CP observables for the decays B-+/-->(DCPK)-K-0*(+/-)
PALANO, Antimo;PAPPAGALLO, MARCO IGNAZIO;POMPILI, ALEXIS
2005-01-01
Abstract
Using a sample of 232x10(6) Upsilon(4S)-> B (B) over bar events collected with the BABAR detector at the PEP-II B Factory in 1999-2004, we study B--> (DK*)-K-0(892)(-) decays where K*--> K(S)(0)pi(-) and D-0-> K(-)pi(+), K(-)pi(+)pi(0), K(-)pi(+)pi(+)pi(-) (non-CP final states); K+K-, pi(+)pi(-) (CP+ eigenstates); K(S)(0)pi(0), K(S)(0)phi, and K(S)(0)omega (CP- eigenstates). We measure four observables that are sensitive to the angle gamma of the CKM unitarity triangle; the partial-rate charge asymmetries A(CP +/-) and the ratios of the B-decay branching fraction in CP +/- and non-CP decays RCP +/-: A(CP+)=-0.08 +/- 0.19(stat)+/- 0.08(syst), A(CP-)=-0.26 +/- 0.40(stat)+/- 0.12(syst), RCP+=1.96 +/- 0.40(stat)+/- 0.11(syst), and RCP-=0.65 +/- 0.26(stat)+/- 0.08(syst).I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
